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Big Engine Damage
For the PPOT Brain Trust:
2008 Navastar (International) DT466 - 6 cylinder in line diesel. Was running just a little bit rough... Loss of power, no lights whatsoever on the dash (and there are MANY) were lit up. So my question is, what do you think happened? My mechanic says the bent pushrod is from #4, and the bad lobe is #2. I can't make sense of that.   #2 Cam lobe   Another lobe starting to go:   What I think is a good lobe: 
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David 1972 911T/S MFI Survivor |
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03-01-2016, 12:08 PM
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
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Whoa! Lots of "bluing" (heat) on that camshaft.
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP  )
Last edited by sand_man; 03-01-2016 at 12:32 PM.. |
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03-01-2016, 12:13 PM
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It looks like your engine s*** itself.
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Edgar 1984 Porsche 944 bone stock 1995 Mercedes E320 wagon 1970 Honda CB350 mint!!! |
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03-01-2016, 12:17 PM
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Banned
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cam metal looks like it was full of airbubbles
when I got a core motor to rebuild for a 455ho gto the cam had wiped out two lobes but they were wore down WITHOUT PITS OR HOLES i WOULD E-MAIL THOSE PIC'S TO THE CORPS REP a bad casting with tooo much air intrained prior to machining is my guess |
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03-01-2016, 01:10 PM
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Thanks. The engine had 150K on it, and I was told the driver must have miss-shifted. After I saw the parts I started to wonder.
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David 1972 911T/S MFI Survivor |
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03-01-2016, 01:13 PM
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Dang. That cam is a disaster yo. How many miles are on it?
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03-01-2016, 01:14 PM
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150,000 miles on the odometer, but the truck was purchased used. Actual mileage may be less.
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David 1972 911T/S MFI Survivor |
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03-01-2016, 01:17 PM
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Quote:
 
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03-01-2016, 01:19 PM
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Location: Oxford, Ct.
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Typical Binder. Fix it sell it buy a truck with a Cummins
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07 GT3 Cup S 4.0, 00 986, 78 911 old school gt car 77 BMW R100S 99 Ducati 996S 04 BMW R1150R DanielJacobsLLC.com |
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03-01-2016, 01:24 PM
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Binder?
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David 1972 911T/S MFI Survivor |
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03-01-2016, 01:39 PM
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In the rubber industry, we call all those tiny bubbles....porosity. Never seen it in a cam lobe, but obviously, the cam maker had a heat issue while molding the cam. Possibly not a long enough cure time, or excess gassing.
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03-01-2016, 01:48 PM
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Now in 993 land ...
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I buy the over-rev. theory. Lobe wear is one thing, but lobe chunks and bent pushrod? Manual trans?
G |
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03-01-2016, 01:50 PM
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Quote:
Like Dan said rebuild it and get rid of it.
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Pete 79 911SC RoW "Tornadoes come out of frikkin nowhere. One minute everything is all sunshine and puppies the next thing you know you've got flying cows".- Stomachmonkey |
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03-01-2016, 01:58 PM
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 This grove worn into the cam is not from over reving. I'll go with bad cam. Improperly hardened.
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03-01-2016, 01:59 PM
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Engine has been rebuilt. I am not up on California smog rules as I should be, but a Cummins swap would strike me as not at all possible.
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David 1972 911T/S MFI Survivor |
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03-01-2016, 02:02 PM
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One can of Engine Restore or Slick 50 you'll be good to go
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2002 Boxster S . Arctic silver + black top/int. Jake Raby 3.6 SS engine " the beast ". GT3 front bumper, GT3 side skirts and GT3 TEK rear diffuser. 1999 996 C4 coupe black/grey with FSI 3.8 engine . Rear diffuser , front spoiler lip with ducktail spoiler . |
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03-01-2016, 02:17 PM
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Don't swap motors swap trucks. We just traded a 2011 International with a Maxxforce motor(most unreliable motor I've ever seen ) for a new Kenworth with a 485hp Paccar motor.
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Pete 79 911SC RoW "Tornadoes come out of frikkin nowhere. One minute everything is all sunshine and puppies the next thing you know you've got flying cows".- Stomachmonkey |
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03-01-2016, 02:22 PM
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"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands." |
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03-01-2016, 02:25 PM
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
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I know nothing about this engine, but I wondered the same...oil starvation?
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP )
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03-01-2016, 02:48 PM
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Evil Genius
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Dr McCoy pointing to never seen before member of the Star Trek security landing party wearing the red uniform shirt:
"He's dead Jim"
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Life is a big ocean to swim in. Wag more, bark less. 
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03-01-2016, 03:02 PM
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1979 Porsche 911SC
1982 Porsche 911SC 3.0L warmed over
